Julian – React, Python, AWS, experts in Lemon.io

Julian

From Colombia (UTC-5)flag

Full-stack Web Developer|Senior
Back-end Web Developer|Strong senior
Front-end Web Developer|Middle

Julian – React, Python, AWS

Julian is a senior backend-focused engineer with deep expertise in Python, Django, FastAPI, and cloud infrastructure (AWS, Azure). He has led backend teams, designed distributed systems for financial and trading platforms, and demonstrates strong architectural thinking and ownership. Communication is clear and collaborative, with a proven ability to work directly with clients and stakeholders. React skills are solid at a middle level, but backend and cloud remain his primary strengths.

10 years of commercial experience in
AI
Cloud computing
Cybersecurity
Data analytics
Web development
Software development
Main technologies
React
10 years
Python
10 years
AWS
3.5 years
PostgreSQL
2.5 years
Django
2 years
SQL
0.5 year
Additional skills
jQuery
Postman
PHP
Celery
MariaDB
Vue.js
JavaScript
Node.js
FastAPI
Typescript
Airflow
Data Science
GraphQL
Flask
Docker
LLM
n8n
CI/CD
LLM orchestration
Django REST
AI
Angular
Databricks
AWS Lambda
Amazon EC2
Amazon S3
Unit testing
Direct hire
Possible
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Experience Highlights

Senior Software Engineer
Apr 2025 - Mar 202611 months
Project Overview

A global enterprise platform supporting supply chain operations, data analytics, and business automation across multiple departments. The solution provides scalable data processing, full-stack internal applications, and AI-powered automation to streamline ETL workflows, enable real-time analytics, and improve operational efficiency through intelligent engineering workflows.

Responsibilities:
  • Architected scalable data and AI pipelines using Apache Airflow, AWS Glue, and Amazon Athena;
  • Developed full-stack web applications using Python (Django/DRF) and React;
  • Optimized PostgreSQL database performance and implemented CI/CD pipelines;
  • Designed n8n- and Airflow-based automation workflows for data synchronization and LLM-driven notifications;
  • Established AI-augmented engineering standards using LLM-powered code generation and AI-assisted workflows;
  • Translated scientific and analytical requirements into production-grade services within Agile environments.
Project Tech stack:
Python
React
Django
Django REST
AI
Docker
LLM orchestration
LLM
CI
CD
n8n
Senior Software Engineer
May 2024 - Apr 202511 months
Project Overview

A workforce management and compliance platform for the construction and field service industries. The solution helps organizations manage field operations, workforce scheduling, compliance, and operational data through scalable backend services, cloud-based analytics, and AI-powered monitoring to improve system reliability and business efficiency.

Responsibilities:
  • Engineered distributed backend services using Python, Django, and Node.js;
  • Managed AWS cloud infrastructure, including Lambda, S3, and EC2, for a high-scale production platform;
  • Built and optimized data analytics pipelines using Databricks, AWS Glue, and Amazon Athena;
  • Implemented AI-powered monitoring alerts using LLM-based log analysis and anomaly detection;
  • Leveraged n8n for workflow orchestration and automated AI-assisted incident response;
  • Maintained frontend clients using React, TypeScript, and Angular;
  • Contributed to CI/CD automation to ensure seamless full-stack delivery.
Project Tech stack:
Python
Django
Node.js
AWS
AWS Lambda
Amazon S3
Amazon EC2
Databricks
React
Typescript
Angular
n8n
LLM
CI
CD
Senior Software Engineer
Jan 2024 - May 20244 months
Project Overview

An IoT data monitoring platform that enables enterprises to visualize real-time sensor data, manage cloud storage integrations, and monitor operational performance. The solution improves visibility into connected devices while enhancing platform reliability through modern engineering practices and AI-assisted development workflows.

Responsibilities:
  • Built and maintained an IoT data dashboard using Python and React.js;
  • Integrated real-time sensor feeds with cloud storage;
  • Implemented CI/CD pipelines and automated unit and integration tests;
  • Improved system observability and overall reliability;
  • Modernized the platform by migrating legacy codebases and upgrading dependencies;
  • Integrated the Claude API for AI-generated documentation and automated code refactoring.
Project Tech stack:
Python
Django
React
Claude API
LLM
CI
CD
Unit testing
Integration Testing
Cloud Architecture
Senior Software Engineer
Sep 2022 - Aug 202311 months
Project Overview

An institutional digital asset platform supporting cryptocurrency trading, data processing, and compliance operations. The solution combines scalable backend services, high-throughput analytics pipelines, and secure cloud infrastructure with AI-driven risk assessment to improve operational efficiency, fraud detection, and regulatory workflows.

Responsibilities:
  • Developed backend systems and trading infrastructure for institutional cryptocurrency products using Python, FastAPI, and PostgreSQL;
  • Orchestrated high-throughput data processing and analytics pipelines with Apache Airflow and Databricks;
  • Transformed raw transactional data into risk and compliance datasets using pandas and NumPy;
  • Deployed and scaled microservices on AWS using Docker and Kubernetes;
  • Implemented secure architectures, automated testing, and GitOps CI/CD practices;
  • Prototyped AI-driven risk assessment modules using LLM embeddings and RAG patterns for fraud detection;
  • Utilized AI code assistants to accelerate backend service development and standardize architectural documentation.
Project Tech stack:
AWS
Python
FastAPI
PostgreSQL
SQLAlchemy
Apache Airflow
Databricks
Pandas
NumPy
Docker
Kubernetes
GitLab CI
CD
CI
CD
LLM
RAG
GitHub Copilot
Claude Code
Full-stack Engineer
Jun 2021 - Sep 20221 year 3 months
Project Overview

A digital platform for a plant-based nutrition and media brand that delivers educational content, recipes, and wellness resources to a broad user base. The solution enhances user engagement through scalable web applications, optimized background processing, and AI-powered content personalization and automation.

Responsibilities:
  • Developed frontend features using Vue.js and backend services with Django;
  • Optimized RESTful API performance for web application services;
  • Optimized background job processing using Celery and Celery Beat;
  • Containerized development environments using Docker and Docker Compose;
  • Implemented CI/CD pipelines with CircleCI;
  • Maintained unit tests and contributed to mobile deployment workflows using Bitrise;
  • Integrated n8n workflows for content personalization and AI-driven user engagement automation.
Project Tech stack:
AWS
PostgreSQL
Vue.js
Django
Django REST
API
Celery
Docker
Docker Compose
CircleCI
Bitrise
n8n
Unit testing
CI
CD
LLM
ETL
Apache Airflow

Education

2021
Systems Engineering
Ingeniería

Languages

Spanish
Advanced
English
Advanced

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